There is many informal ways to introduce. Just shake your hands with the other person with a gentle laugh first & say "Hi Michael", after the other person tell his own name. There is no need to tell your name if it is not necessary in most cases. If you feel him friendly & your in good mood, tell your name in half pronounced way. If he ask you again, then tell your name though you stutter. Don't even care about that situation after 1 min.